Wiktionary
second-stringer
alt. 1 A person who plays second string. A person who is kept on a sports team as a backup in case a ''first string'' player is unavailable. 2 A person who is not good enough to be considered proficient but is possible as a backup. n. 1 A person who plays second string. A person who is kept on a sports team as a backup in case a ''first string'' player is unavailable. 2 A person who is not good enough to be considered proficient but is possible as a backup.